@incollection{eprints2158,
       publisher = {Bompiani},
       booktitle = {Enciclopedia Filosofica},
           title = {Ricorsivit{\`a}},
            year = {2006},
          volume = {10},
           pages = {9723--9726},
          author = {Stefano Gattei and Evandro Agazzi},
             url = {http://eprints.imtlucca.it/2158/}
}